Q.
Which is not the intermediate stage of following conversion?
$\left( CH_{3} \right)_{2} - C - C - \left( CH_{3} \right)_{2}\underset{\mathrm{\Delta}}{\overset{\ \ Dil.H_{2}{SO}_{4\ \ }\ }{\rightarrow}}\ CH_{3}COC\left( CH_{3} \right)_{3}$
$|$ $|$
$OH\$ $OH$
A) [image:11_image219.emf]
B) [image:11_image220.emf]
C) [image:11_image221.emf]
D) [image:11_image222.emf]
Explanation
(a)
Pinacol $\left( CH_{3} \right)_{2} - C(OH)C(OH)\left( CH_{3} \right)_{2}$ with dil $H_{2}SO_{4}$ or $HCl$ undergoes dehydration and rearranges to form ketones (pinacolon)
[image:11_image332.emf]
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.